// ==UserScript==
// @name        替换网页字体
// @author      ai
// @version     2.3
// @match       *://*/*
// @run-at      document-start
// @grant       GM_addStyle
// @grant       GM_getValues
// @grant       GM_getValue
// @grant       GM_setValues
// @grant       GM_setValue
// @grant       GM_addValueChangeListener
// @grant       GM_listValues
// @grant       GM_registerMenuCommand
// @grant       GM_unregisterMenuCommand
// @description 替换网页的字体
// @namespace https://greasyfork.org/users/22620
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    
    const DEFAULT_CONFIG = {
        font: '微软雅黑',
        exclusions: 'i, [class*="ico"], [class*="emoji"], [class*="fa-"]',
        enabled: true
    };
    
    class FontManager {
        constructor() {
            this.config = this.loadConfig();
            this.applyFont();
            if (window.top === window) this.initMenu();
            GM_listValues().forEach(key => {
                GM_addValueChangeListener(key, () => this.applyFont())
            })
        }
        
        loadConfig() {
            return GM_getValues(DEFAULT_CONFIG)
        }
        
        saveConfig(key, value) {
            if (GM_getValue(key) === value) return;
            GM_setValue(key, value);
            this.config = this.loadConfig();
        }
        
        generateCSS(font) {
            const notSelector = this.config.exclusions.split(',')
                    .map(s => s.trim())
                    .filter(Boolean)
                    .map(s => `:not(${s})`)
                    .join('');
            
            return `*${notSelector} { font-family: ${font} !important; }`;
        }
        
        async applyFont() {
            // 移除旧样式
            this.styleElement?.remove();

            if (!this.config.enabled) return;
            
            // 注入初始字体
            this.styleElement = GM_addStyle(this.generateCSS(this.config.font));
            
            // 等待网页字体加载后更新
            await document.fonts.ready;
            const fonts = new Set();
            document.fonts.forEach(font => fonts.add(`"${font.family}"`));
            const webFonts = [...fonts].join(', ');
            const finalFonts = webFonts ? `${this.config.font}, ${webFonts}` : this.config.font;
            
            this.styleElement.textContent = this.generateCSS(finalFonts);
        }
        
        
        initMenu() {
            this.menuCommands = new Map();
            this.updateMenu();
        }
        
        updateMenu() {
            // 清除旧菜单
            this.menuCommands.forEach(id => GM_unregisterMenuCommand(id));
            this.menuCommands.clear();
            
            // 注册新菜单
            this.menuCommands.set('enabled', GM_registerMenuCommand(
                this.config.enabled ? '❌ 禁用字体替换' : '✅ 启用字体替换',
                () => this.toggleEnabled()
            ));
            
            this.menuCommands.set('font', GM_registerMenuCommand('🖋️ 配置字体名称', 
                () => this.promptConfig('font', '请输入新的字体名称')
            ));
            
            this.menuCommands.set('exclusions', GM_registerMenuCommand('🚫 配置排除元素列表',
                () => this.promptConfig('exclusions', '请输入新的排除元素选择器')
            ));
            
            this.menuCommands.set('reset', GM_registerMenuCommand('🗑️ 恢复默认设置',
                () => this.resetToDefault()
            ));
        }
        
        toggleEnabled() {
            this.saveConfig("enabled", !this.config.enabled);
            this.updateMenu();
        }
        
        promptConfig(type, promptText) {
            const current = this.config[type];
            const newValue = prompt(`${promptText}:\n(用逗号分隔，例如: ${type === 'font' ? '"微软雅黑", system-ui' : 'i, [class*="ico"]'})`, current);
            
            if (newValue) {
                this.saveConfig(type, newValue);
            }
        }
        
        resetToDefault() {
            if (confirm('确定要将所有配置恢复为默认值吗？')) {
                GM_setValues(DEFAULT_CONFIG);
                this.config = this.loadConfig();
                this.applyFont();
                this.updateMenu();
            }
        }
    }
    
    new FontManager();
})();